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Nexperia USA Inc. BUK9Y65-100E,115

Name: BUK9Y65-100E,115
Brand: Nexperia USA Inc.
SKU: BUK9Y65-100E,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9Y65-100E,115

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: SC-100, SOT-669

Datasheet:: BUK9Y65-100E,115.pdf

Description:: MOSFET N-CH 100V 19A LFPAK56

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Product details

Overview

BUK9Y65-100E from Nexperia is an AEC-Q101 qualified N-channel logic-level MOSFET in LFPAK56 (SOT669) package, rated for 100 V V_DS, 65 mΩ R_DS(on) at V_GS = 5 V and T_j = 25 °C, with 175 °C maximum junction temperature and repetitive avalanche rating - deployed in automotive transmission control and high-reliability 12–48 V power switching.

For engineers reviewing the BUK9Y65-100E datasheet, BUK9Y65-100E pinout, BUK9Y65-100E application, or BUK9Y65-100E equivalent, this device is selected for thermally demanding automotive loads requiring true logic-level gate drive (V_GS(th) > 0.5 V at 175 °C), low thermal resistance (R_th(j-mb) = 2.31 K/W), and robust unclamped avalanche energy (25.3 mJ).

Technical Context

This MOSFET uses TrenchMOS technology to achieve low R_DS(on) while maintaining stable threshold voltage across temperature (0.5–2.1 V range). Its LFPAK56 package integrates a thermally optimized mounting base directly connected to drain, enabling efficient heat transfer to PCB copper.

The device supports fast switching with t_d(on) = 8.1 ns, t_r = 13.6 ns, Q_GD = 6 nC, and features integrated source-drain diode with V_SD = 0.81–1.2 V and t_rr = 29 ns - critical for flyback and inductive load commutation in automotive solenoid drivers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - supports 48 V automotive systems with 2× safety margin against transients.
R_DS(on)	65 mΩ max at V_GS = 5 V, T_j = 25 °C - enables <1.6 W conduction loss at 5 A DC load current.
I_D	19 A continuous at T_mb = 25 °C - sufficient for high-current motor and lamp drivers without forced cooling.
R_th(j-mb)	2.31 K/W - allows direct thermal coupling to PCB copper pour, reducing junction temperature rise by ~43 K/W vs SO-8.
E_AS	25.3 mJ non-repetitive avalanche energy - withstands inductive kickback in transmission valve control without external snubbers.
V_GS(th)	≥0.5 V at T_j = 175 °C - ensures reliable turn-on with standard 3.3 V/5 V microcontroller GPIOs under worst-case thermal stress.
Q_GD	6 nC - limits Miller-induced shoot-through risk in half-bridge configurations with moderate gate drive strength.

Pinout & Package

LFPAK56 (SOT669) is a surface-mount plastic package with exposed mounting base for enhanced thermal performance. The base is electrically connected to drain, enabling low-inductance, high-current routing and direct PCB thermal conduction.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	Source (S)	Three parallel source terminals reduce bond wire inductance and improve current sharing in high-di/dt switching.
4	Gate (G)	Single gate input with low input capacitance (C_iss = 1142–1523 pF) for fast, low-power driving.
Mounting Base	Drain (D)	Exposed copper pad tied to drain - serves as primary current path and thermal interface to PCB heatsink area.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per ISO 10605.
Repetitive avalanche rating	Enables operation in unclamped inductive switching without derating - eliminates need for external clamping diodes in many solenoid drivers.
175 °C maximum junction temperature	Supports engine bay placement and sustained operation in sealed enclosures without active cooling.
True logic-level gate	V_GS(th) ≥ 0.5 V at 175 °C ensures full enhancement with 3.3 V MCU outputs even under thermal stress.
Low R_th(j-mb)	2.31 K/W enables >60% higher power dissipation than standard SO-8 at same board area, reducing thermal design overhead.

Applications

Automotive Transmission Control

12 V/24 V Lamp Driver

Use Scenario: PWM-controlled hydraulic solenoid valves in automatic transmission modules operating at 125 °C ambient.

IC Role / Device Role / Timing Role: High-side or low-side power switch handling 8–12 A peak current with 20 kHz switching and fast fall time (t_f = 12.6 ns).

Use Value: Repetitive avalanche rating absorbs inductive energy during rapid valve de-energization, eliminating external TVS and reducing BOM count.

Use Scenario: Headlamp and fog lamp dimming in modern LED+halogen hybrid lighting systems.

IC Role / Device Role / Timing Role: Low-side switch controlling up to 15 A resistive load with 100 µs overcurrent response via integrated current sensing capability.

Use Value: 65 mΩ R_DS(on) minimizes self-heating at 10 A, enabling compact 2-layer PCB layout without heatsinks.

48 V Mild Hybrid Starter Generator

Electric Power Steering (EPS) Motor Phase Switch

Use Scenario: Pre-charge and main contactor replacement in 48 V battery management systems for mild hybrid vehicles.

IC Role / Device Role / Timing Role: High-voltage, high-current power switch with 100 V rating and 76 A pulsed current capability (t_p ≤ 10 µs).

Use Value: 100 V V_DS provides 2× margin over nominal 48 V bus, accommodating load dump transients up to 85 V per ISO 7637-2.

Use Scenario: Inverter phase leg switching in brushless DC motor control for EPS systems with 150 °C under-hood ambient.

IC Role / Device Role / Timing Role: Low-side MOSFET in three-phase bridge with fast switching (t_r/t_f < 15 ns) and low Q_GD to minimize cross-conduction losses.

Use Value: 175 °C T_j rating and 2.31 K/W thermal resistance allow sustained 10 A RMS operation on standard FR-4 with 2 oz copper.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel automotive MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N10F7	100 V, 2.2 mΩ R_DS(on) at V_GS = 10 V; requires 10 V gate drive; no AEC-Q101 certification stated.	Higher efficiency at high current but unsuitable for 3.3 V logic-level drive; not qualified for automotive use.	Select only if system uses 10 V gate driver and operates outside AEC-Q101 scope.
ON Semiconductor NTMFS5C675NL	100 V, 5.2 mΩ R_DS(on) at V_GS = 10 V; LFPAK56 package; AEC-Q101 qualified; V_GS(th) min = 2.0 V.	Better conduction loss at high current, but higher V_GS(th) prevents reliable turn-on with 3.3 V MCUs at elevated temperature.	Prefer when gate drive is ≥5 V and thermal margin is less constrained; avoid where 3.3 V logic-level operation is mandatory.

Compared with STL220N10F7 and NTMFS5C675NL, BUK9Y65-100E uniquely balances AEC-Q101 compliance, true 3.3 V logic-level operation, and 65 mΩ R_DS(on) - making it optimal for space-constrained, thermally aggressive automotive body electronics where gate drive voltage and qualification are non-negotiable.

Availability

BUK9Y65-100E is available at Aetrix Electronics and suitable for automotive transmission control, 48 V mild hybrid contactor replacement, and electric power steering motor phase switching requiring stable component supply across extended product lifecycles.

Supply support for BUK9Y65-100E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete, logic, and MOSFET solutions - spun off from Philips and now part of Wingtech Group.

This device belongs to Nexperia's Automotive Logic-Level Power MOSFET product line, engineered specifically for AEC-Q101-compliant, thermally robust switching in 12–48 V automotive subsystems where gate drive simplicity and ruggedness are critical.

FAQ

Is BUK9Y65-100E suitable for high-side switching configurations?

No - the LFPAK56 mounting base is internally connected to drain, and the package lacks isolated source terminals required for floating high-side gate drive. It is designed exclusively for low-side or common-source switching where drain can be referenced to ground or high-voltage rail via PCB copper.

What is the maximum continuous drain current at 100 °C mounting base temperature?

Per Figure 1 in the datasheet, the maximum continuous drain current is 13.4 A at T_mb = 100 °C and V_GS = 5 V. This reflects thermal derating due to reduced heat transfer efficiency at elevated board temperatures, not electrical limitation.

Does BUK9Y65-100E include integrated ESD protection?

Yes - it meets HBM ESD rating of ±2 kV per AEC-Q101 requirements. The device incorporates on-chip protection diodes between gate and source, validated through standardized human-body model testing, eliminating need for external gate protection in most automotive PCB layouts.

Can this MOSFET replace older SO-8 packaged devices without PCB redesign?

Yes - LFPAK56 (SOT669) has identical PCB footprint and solder pad layout to standard Power-SO8, enabling drop-in replacement. However, the mounting base must be connected to drain net (not ground), and thermal relief patterns should be optimized for copper pour attachment to maximize R_th(j-mb) benefit.

BUK9Y65-100E,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SC-100, SOT-669

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 19A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 5V

Rds On (Max) @ Id, Vgs:: 63.3mOhm @ 5A, 10V

Vgs(th) (Max) @ Id:: 2.1V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 14 nC @ 5 V

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 1523 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 64W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: LFPAK56, Power-SO8

BUK9Y65-100E,115 FAQ

1.How can I place an order for BUK9Y65-100E,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9Y65-100E,115 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BUK9Y65-100E,115 reliable?

The price and inventory of BUK9Y65-100E,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9Y65-100E,115 is usually 5 days.

3.What payment methods are accepted for BUK9Y65-100E,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9Y65-100E,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9Y65-100E,115?

BUK9Y65-100E,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9Y65-100E,115 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BUK9Y65-100E,115?

For technical support, including BUK9Y65-100E,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9Y65-100E,115 requirements.

6.How does Aetrix verify that BUK9Y65-100E,115 is sourced from the original manufacturer or authorized distributors?

All BUK9Y65-100E,115 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BUK9Y65-100E,115 meets industry standards.

7.What is the process for return or replacement of BUK9Y65-100E,115?

All BUK9Y65-100E,115 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9Y65-100E,115, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BUK9Y65-100E,115 part is unused and in its original packaging.

Return procedure for BUK9Y65-100E,115:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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